Device used to indirectly apply a liquid or viscous medium onto a material web, specifically a paper or cardboard web

a technology of liquid or viscous medium and moving material, applied in the direction of papermaking, press section, coating, etc., can solve the problem of structurally expensive design in the known applicator uni

Inactive Publication Date: 2000-10-03
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The necessity of having to combine the movements of the spreading rolls conforming to two degr

Method used

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  • Device used to indirectly apply a liquid or viscous medium onto a material web, specifically a paper or cardboard web
  • Device used to indirectly apply a liquid or viscous medium onto a material web, specifically a paper or cardboard web
  • Device used to indirectly apply a liquid or viscous medium onto a material web, specifically a paper or cardboard web

Examples

Experimental program
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Embodiment Construction

Referring now to the drawings and particularly to FIG. 1, there is shown an applicator device in accordance with the invention, generally identified with 10. It includes a transfer roll 12 onto the surface 12a of which a layer of liquid or viscous medium 16 is applied by an applicator unit 14. The transfer roll 12 rotates around an axis A in direction of arrow P. As a result of the rotation of transfer roll 12, the coating medium 16 is brought to a material web 18 which is traveling in direction L and which wraps partially around the circumference of the transfer roll 12.

A support or backing roll 20 is provided on the side of material web 18 which faces away from the transfer roll 12. It rotates around axis B in direction of arrow P', that is, in opposite direction to transfer roll 12. Transfer roll 12 and back-up roll 20 form a transfer nip 22 in which the liquid or viscous medium 16 is brought into contact with, and transferred onto material web 18. To improve contact of coating m...

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PUM

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Abstract

A device for indirect application of a liquid or viscous medium onto a traveling material web, specifically a paper or cardboard web, includes an applicator device for the application of a layer of liquid or viscous medium onto a surface of a transfer element. The transfer element is in contact with the moving material web and transfers the coating onto the web. A leveling unit is equipped with a leveling element positioned against the material web for smoothing of the coating layer on the material web. The leveling element is mounted rigidly in cross direction to the material web, that is, in a direction substantially orthogonal and in a local material web progression to the direction of travel of the material web.

Description

1. Field of the InventionThe present invention relates to a device for indirect application of a liquid or viscous medium onto a moving material web, specifically a paper or cardboard web.2. Description of the Related ArtDevices for indirect application of a medium onto a moving web are known, for example, from German Patent Documents DE 43 02 435 A1 and DE 42 43 518 A1. The units described in these two documents utilize spreading rolls in processing the still moist coating layer in order to smooth surface roughness from the coating layer. Such surface roughness occurs due to the so-called "film-splitting" effect when the material web separates from the transfer element. In order to achieve the spreading movement, these spreading rolls, which are mounted transversely to the material web, are driven rotationally around their axis. Due to an additional drive, the spreading rolls perform an oscillating movement. The necessity of having to combine the movements of the spreading rolls co...

Claims

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Application Information

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IPC IPC(8): B05C1/08D21H23/00D21H23/34B05C9/00B05C9/04B05C11/04B05C11/02D21H25/00D21H25/10D21H25/12D21H23/56B05D1/40D21H25/08
CPCB05C1/083D21H23/34B05C9/04B05C11/025D21H25/12D21H23/56D21H25/10B05C11/04
Inventor SEIZ, ROLANDTREFZ, MICHAEL
Owner VOITH PATENT GMBH
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